{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:21.628708", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2025-Oct-29_to_2025-Oct-31_304.0_-22.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2025100000661}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "October 29 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 31 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 54517.14958485516}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Brazil", "Paraguay"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "America"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -22.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 304.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "304.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 302.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 304.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -20.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-58.53, -19.97], [-58.0, -19.75], [-57.75, -19.85], [-57.5, -19.75], [-57.25, -19.85], [-57.0, -19.75], [-56.47, -19.97], [-56.32, -20.32], [-56.25, -20.35], [-56.0, -20.25], [-55.47, -20.47], [-55.25, -21.0], [-55.35, -21.25], [-55.25, -21.5], [-55.35, -21.75], [-55.25, -22.0], [-55.35, -22.25], [-55.32, -22.32], [-54.97, -22.47], [-54.75, -23.0], [-54.97, -23.53], [-55.32, -23.68], [-55.47, -24.03], [-56.0, -24.25], [-56.53, -24.03], [-56.68, -23.68], [-57.03, -23.53], [-57.18, -23.18], [-57.53, -23.03], [-57.75, -22.5], [-57.65, -22.25], [-57.75, -22.0], [-57.62, -21.7], [-58.03, -21.53], [-58.18, -21.18], [-58.53, -21.03], [-58.75, -20.5], [-58.53, -19.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["South-American-Monsoon", "S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-10-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.52999999999997, -21.03], [-58.75, -20.5], [-58.52999999999997, -19.97], [-58.0, -19.75], [-57.75, -19.85], [-57.5, -19.75], [-57.25, -19.85], [-57.0, -19.75], [-56.47000000000003, -19.97], [-56.31999999999999, -20.32], [-56.25, -20.35], [-56.0, -20.25], [-55.47000000000003, -20.47], [-55.25, -21.0], [-55.35000000000002, -21.25], [-55.25, -21.5], [-55.35000000000002, -21.75], [-55.25, -22.0], [-55.35000000000002, -22.25], [-55.31999999999999, -22.32], [-54.97000000000003, -22.47], [-54.75, -23.0], [-54.97000000000003, -23.53], [-55.31999999999999, -23.68], [-55.47000000000003, -24.03], [-56.0, -24.25], [-56.52999999999997, -24.03], [-56.68000000000001, -23.68], [-57.02999999999997, -23.53], [-57.18000000000001, -23.18], [-57.52999999999997, -23.03], [-57.75, -22.5], [-57.64999999999998, -22.25], [-57.75, -22.0], [-57.620000000000005, -21.7], [-58.02999999999997, -21.53], [-58.18000000000001, -21.18], [-58.52999999999997, -21.03]]]]}, "2025-10-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.52999999999997, -21.03], [-58.75, -20.5], [-58.52999999999997, -19.97], [-58.0, -19.75], [-57.75, -19.85], [-57.5, -19.75], [-57.25, -19.85], [-57.0, -19.75], [-56.47000000000003, -19.97], [-56.31999999999999, -20.32], [-56.25, -20.35], [-56.0, -20.25], [-55.47000000000003, -20.47], [-55.25, -21.0], [-55.35000000000002, -21.25], [-55.25, -21.5], [-55.35000000000002, -21.75], [-55.25, -22.0], [-55.35000000000002, -22.25], [-55.31999999999999, -22.32], [-54.97000000000003, -22.47], [-54.75, -23.0], [-54.97000000000003, -23.53], [-55.31999999999999, -23.68], [-55.47000000000003, -24.03], [-56.0, -24.25], [-56.52999999999997, -24.03], [-56.68000000000001, -23.68], [-57.02999999999997, -23.53], [-57.18000000000001, -23.18], [-57.52999999999997, -23.03], [-57.75, -22.5], [-57.64999999999998, -22.25], [-57.75, -22.0], [-57.620000000000005, -21.7], [-58.02999999999997, -21.53], [-58.18000000000001, -21.18], [-58.52999999999997, -21.03]]]]}, "2025-10-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.52999999999997, -21.03], [-58.75, -20.5], [-58.52999999999997, -19.97], [-58.0, -19.75], [-57.75, -19.85], [-57.5, -19.75], [-57.25, -19.85], [-57.0, -19.75], [-56.47000000000003, -19.97], [-56.31999999999999, -20.32], [-56.25, -20.35], [-56.0, -20.25], [-55.47000000000003, -20.47], [-55.25, -21.0], [-55.35000000000002, -21.25], [-55.25, -21.5], [-55.35000000000002, -21.75], [-55.25, -22.0], [-55.35000000000002, -22.25], [-55.31999999999999, -22.32], [-54.97000000000003, -22.47], [-54.75, -23.0], [-54.97000000000003, -23.53], [-55.31999999999999, -23.68], [-55.47000000000003, -24.03], [-56.0, -24.25], [-56.52999999999997, -24.03], [-56.68000000000001, -23.68], [-57.02999999999997, -23.53], [-57.18000000000001, -23.18], [-57.52999999999997, -23.03], [-57.75, -22.5], [-57.64999999999998, -22.25], [-57.75, -22.0], [-57.620000000000005, -21.7], [-58.02999999999997, -21.53], [-58.18000000000001, -21.18], [-58.52999999999997, -21.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.09203841963}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.504106223858178}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.587317001610472, 18.254072209408434, 22.00037489773939]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.478468831380212, 16.74394251505538, 20.649793243408226]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.32668967977722, -7.528562304176585, -3.65706668762073]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.09203841963, -8.06849649864887, -4.272032435135145]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.8505797877224133, -2.593116506886129, -1.2507446724448577]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.95875543634486, -2.7636063996870908, -1.3211338679856142]}}